1/3 Scale P-51

Why not share your information on your latest creation
David Brown
Posts: 356
Joined: November 10th, 2009, 8:24 pm
Location: Burton-on-Trent
Contact:

1/3 Scale P-51

Postby David Brown » November 17th, 2018, 2:12 pm

I purchased this project at the Nats in 2017. Having instructed my fellow modeling friends not to let me buy another big project they let me down badly. Its in need of some major TLC and strengthening around the wing area, I am told it has flown on a 150 twin but i have a 250 to graft into it with a reduction drive to swing a big prop similar to my 1/3 Spit set up. The wings are being changed to a 3 piece set up instead of the original 2 piece, a big alloy reinforcing blade has been machined to strengthen the center section and tubes will attach the wing tips. Retracts are started which are very similar to the spit ones I made and tried for size, naturally the legs will not be the same.
Attachments
P51eng1.jpg
P51eng1.jpg (81.29 KiB) Viewed 1325 times
P51w6.jpg
P51w6.jpg (97.16 KiB) Viewed 1325 times
P51w1.jpg
P51w1.jpg (78.05 KiB) Viewed 1325 times
P51w2.jpg
P51w2.jpg (69.51 KiB) Viewed 1325 times
P51eng2.jpg
P51eng2.jpg (86.54 KiB) Viewed 1325 times
P51uc1.jpg
P51uc1.jpg (99.09 KiB) Viewed 1325 times
P51uc2.jpg
P51uc2.jpg (96.59 KiB) Viewed 1325 times

David Brown
Posts: 356
Joined: November 10th, 2009, 8:24 pm
Location: Burton-on-Trent
Contact:

Re: 1/3 Scale P-51

Postby David Brown » November 17th, 2018, 2:19 pm

The engine has now been modified to fit with a reduction of 2 to 1 swinging a 40 X 26 prop for running in. There are just a couple of small jobs to do before I can run it up one of which is a tie bar from the prop driver mount to the bulkhead.
Attachments
P51-5.jpg
P51-5.jpg (74.91 KiB) Viewed 1323 times
P51-6.jpg
P51-6.jpg (77.58 KiB) Viewed 1323 times
P51-7.jpg
P51-7.jpg (70.69 KiB) Viewed 1323 times
P51-9.jpg
P51-9.jpg (74.26 KiB) Viewed 1323 times
P51-8.jpg
P51-8.jpg (70.48 KiB) Viewed 1323 times
P51eng9.jpg
P51eng9.jpg (87.9 KiB) Viewed 1323 times
P51eng10.jpg
P51eng10.jpg (77.21 KiB) Viewed 1323 times

Colin Deery
Posts: 12
Joined: July 27th, 2011, 8:13 pm
Contact:

Re: 1/3 Scale P-51

Postby Colin Deery » November 22nd, 2018, 12:05 pm

Hi Dave, is the reduction drive unit manufactured by yourself?

David Brown
Posts: 356
Joined: November 10th, 2009, 8:24 pm
Location: Burton-on-Trent
Contact:

Re: 1/3 Scale P-51

Postby David Brown » November 29th, 2018, 2:57 pm

Yes Colin, I have my own CNC business and its one of the perks of the job. I purchased Solid works this year and it has made making these sort of projects a lot easier than when I designed them on the back of a fag packet.

Colin Deery
Posts: 12
Joined: July 27th, 2011, 8:13 pm
Contact:

Re: 1/3 Scale P-51

Postby Colin Deery » December 4th, 2018, 12:03 pm

That's good to know Dave.. fantastic looking bit of engineering!
I have a 1/3 scale model which has a 3/1 reduction unit powered by a Zenoah 62.
From memory the scale prop is around 38 inch. The engine is reversed so the prop swings clockwise.
Can a unit be manufactured for most engines? will the bearings need up graded to cope?
Colin.

David Brown
Posts: 356
Joined: November 10th, 2009, 8:24 pm
Location: Burton-on-Trent
Contact:

Re: 1/3 Scale P-51

Postby David Brown » December 4th, 2018, 2:17 pm

Not all engines are suitable and in many cases the front bearings can cope, with my Zenoah projects I add a second bearing to give added support due to the crank design.


Return to “Your New Projects”

Who is online

Users browsing this forum: No registered users and 5 guests